April 21 2008, Professor Stephen Hawking and His Daughter gave a lecture that is part of a
April 21 2008, Professor Stephen Hawking and His Daughter gave a lecture that is part of a series honoring NASA's 50th anniversary. The title of Hawking's lecture is "Why we should go into space."
NASA 50th Anniversary Lecture: (intro) Stephen Hawking (1/5):
http://www.youtube.com/watch?v=o_TQrb-zSnM
NASA 50th Anniversary Lecture: Prof. Stephen Hawking (2/5):
http://www.youtube.com/watch?v=fEfh7Cc4-ng&watch_response
NASA 50th Anniversary Lecture: Lucy Hawking (3/5):
http://www.youtube.com/watch?v=nvwfW3tPleQ&watch_response
NASA 50th Anniversary Lecture: Prof. Stephen Hawking (4/5):
http://www.youtube.com/watch?v=td3TPeGvV0A
NASA 50th Anniversary Lecture: Prof. Stephen Hawking (5/5):
http://www.youtube.com/watch?v=QjJZT5pKHgI
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Added: 3 months ago
Views: 1,694
Note: I edited this video, here is the full 10mins.
Stephen Hawking: Asking big questions
Note: I edited this video, here is the full 10mins.
Stephen Hawking: Asking big questions about the universe
http://www.youtube.com/watch?v=xjBIsp8mS-c
http://www.ted.com In keeping with the theme of TED2008, professor Stephen Hawking asks some Big Questions about our universe -- How did the universe begin? How did life begin? Are we alone? -- and discusses how we might go about answering them.
PLEASE SUBSCRIBE TO: http://www.youtube.com/user/TEDtalksDirector
"Since, in the long run, every planetary civilization will be endangered by impacts from space, every surviving civilization is obliged to become spacefaring--not because of exploratory or romantic zeal, but for the most practical reason imaginable: staying alive... If our long-term survival is at stake, we have a basic responsibility to our species to venture to other worlds."
Carl Sagan, Pale Blue Dot, 1994
"We need the stars... We need purpose! We need the image the Destiny [to take root among the stars] gives us of ourselves as a purposeful, growing species. We need to become the adult species that the Destiny can help us become! If we're to be anything other than smooth dinosaurs who evolve, specialize and die, we need the stars.... When we have no difficult, long-term purpose to strive toward, we fight each other. We destroy ourselves. We have these chaotic, apocalyptic periods of murderous craziness."
Octavia Butler, Parable of the Talents, 1998
"I don't think the human race will survive the next thousand years, unless we spread into space. There are too many accidents that can befall life on a single planet. But I'm an optimist. We will reach out to the stars."
Stephen Hawking, interview with Daily Telegraph, 2001
"The dinosaurs became extinct because they didn't have a space program. And if we become extinct because we don't have a space program, it'll serve us right!"
Larry Niven, quoted by Arthur Clarke in interview
at space.com, 2001
"In time, [a Martian] colony would grow to the point of being self- sustaining. When this stage was reached, humanity would have a precious insurance policy against catastrophe at home. During the next millennium there is a significant chance that civilization on Earth will be destroyed by an asteroid, a killer plague or a global war. A Martian colony could keep the flame of civilization and culture alive until Earth could be reverse- colonized from Mars."
Paul Davies, The New York Times, 2004
"We must turn our guns away from each other and outwards, to defend the Earth, creating a global and in space network of sensors and telescopes to find asteroids that could destroy our planet and create the systems to stop them. It makes no sense to dream great dreams while waiting to be hit by a train." Buzz Aldrin and Rick Tumlinson, Ad Astra Online, 2006
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Added: 4 months ago
Views: 5,468
This is Carl's last interveiw (1996)
Full interview:
Part1
http://www.youtube.com/watc
This is Carl's last interveiw (1996)
Full interview:
Part1
http://www.youtube.com/watch?v=GU192A1Oz4k
Part2
http://www.youtube.com/watch?v=Mzd9vFLQQPE
Part3
http://www.youtube.com/watch?v=O0CPaMMrpmU
Part4
http://www.youtube.com/watch?v=HABR9-SLods
The Demon-Haunted World: Science as a Candle in the Dark is a book by Carl Sagan intended to explain the scientific method to laymen, and to encourage people to learn critical or skeptical thinking. It explains methods to help distinguish between ideas that are considered valid science, and ideas that can be considered pseudoscience. Sagan states that when new ideas are offered for consideration, they should be tested by means of skeptical thinking, and should stand up to rigorous questioning.
Sagan said if a new idea continues in existence after an examination of the propositions, it should then be acknowledged as a supposition. Skeptical thinking essentially is a means to construct, understand, reason, and recognize valid and invalid arguments. Wherever possible, there must be independent validation of the concepts whose truth should be proved. He believed that reason and logic would succeed once the truth is known. Conclusions emerge from premises, and the acceptability of the premises should not be discounted or accepted because of bias.
Sagan presents a set of tools for skeptical thinking which he calls the "baloney detection kit". Skeptical thinking consists both of constructing a reasoned argument and recognizing a fallacious or fraudulent one. In order to identify a fallacious argument, Sagan suggests the employment of such tools as independent confirmation of facts, quantification and the use of Occam's razor. Sagan's "baloney detection kit" also provided tools for detecting "the most common fallacies of logic and rhetoric", such as argument from authority and statistics of small numbers.
Through these tools, the benefits of a critical mind and the self-correcting nature of science can take place. Sagan provides a skeptical analysis of several kinds of superstition, fraud, pseudoscience and religious beliefs, such as gods, witches, UFOs, ESP and faith healing.
A remembrance of Carl Sagan, astronomer, writer, and national teacher of science. Here is how he introduced his 1980 public television series "Cosmos."
------------------------------------------------------------ --------------------
CARL SAGAN: ("Cosmos" 1980) The size and age of the Cosmos are beyond ordinary human understanding. Lost somewhere between immensity and eternity is our tiny planetary home, the Earth. For the first time we have the power to decide the fate of our planet and ourselves. This is a time of great danger, but our species is young and curious and brave. It shows much promise. In the last few millennia we have made almost astonishing and unexpected discoveries about the cosmos and our place within it. I believe our future depends powerfully on well we understand this cosmos in which we float like a mode of dust in the morning sky.
We're about to begin a journey through the cosmos. We'll encounter galaxies and suns and planets, life and consciousness coming into being, evolving, and perishing, worlds of ice and stars of diamond, atoms as massive as suns and universes smaller than atoms. But it's also a story of our own planet, and the plants and animals that share it with us, and it's a story about us, how we achieved our present understanding of the cosmos, how the cosmos has shaped our evolution and our culture and what our fate may be. We wish to pursue the truth no matter where it leads, but to find the truth, we need imagination and skepticism both. We will not be afraid to speculate, but we will be careful to distinguish speculation from fact. The cosmos is full beyond measure of elegant truths, of exquisite inter-relationships, of the awesome machinery of nature.
The surface of the Earth is the shore of the cosmic ocean. On this shore we've learned most of what we know. Recently, we've waded a little way out, maybe ankle-deep, and the water seems inviting. Some part of our being knows this is where we came from. We long to return. And we can't, because the cosmos is also within us. We're "made" of star stuff. We are a way that the cosmos can know itself. The journey for each of us begins here. We're going to explore the cosmos in a ship of the imagination, unfettered by ordinary limits on speed and size, drawn by the music of cosmic harmonies. It can take us anywhere in space and time. Perfect as a snowflake, organic as a dandelion seed, it will carry us to worlds of dreams and worlds of facts. Come with me.
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A basic scientific tool to test theories in cosmology is to evaluate their consequences fo
A basic scientific tool to test theories in cosmology is to evaluate their consequences for the observable parts of the Universe. This includes, among other things, the distribution of matter (galaxies and intergalactic gas) as it is seen, now. Since looking further into the distance also means looking back in time, a meaningful test of the evolution of that distribution over time is possible.
The Millennium Run simulation starts with the initial state of the Universe, where the Cosmic background radiation was created. Its properties are well known by satellite experiments and serve as the starting point for the corresponding matter distribution. Using the physical laws of the currently known cosmologies, the evolution of matter as galaxies and black holes is simulated and recorded.
This simulation was created and executed for the first time in 2005 by the Virgo consortium, an international group of astrophysicists from Germany, the UK, Canada, Japan and the USA.
PLEASE READ: I screwed up - The three nearest known stars are gravitationally bound in a system commonly called Alpha Centauri. The two larger stars, said to be Sun-like, are named Alpha Centauri A and B. The nearest to us is the littlest and is called Proxima Centauri. It is classified as a red dwarf and contains just a fraction of the mass of our Sun.
The three-star system is 4.36 light-years away, meaning light requires 4.36 years to travel from the stars to Earth, and so we see them as they existed 4.36 years ago.
Astronomers announced that Alpha Centauri A is now calculated to be 1,061,000 miles wide (1,708,000 kilometers), or 1.227 times the size of the Sun. The B-star is 748,100 miles across (1,204,000 kilometers), or 0.865 times the Sun's diameter. A parsec (symbol pc) is a unit of length used in astronomy. The length of the parsec is based on the method of trigonometric parallax, one of the oldest methods for measuring the distances to stars.
The name parsec stands for "parallax of one second of arc", and one parsec is defined to be the distance from the Earth to a star that has a parallax of 1 arcsecond. The actual length of a parsec is approximately 3.262 light-years.
Music by,
Pink Floyd: "Learning to Fly" is the second song on Pink Floyd's album A Momentary Lapse of Reason. The song is written largely by David Gilmour. It describes Gilmour's thoughts on flying, for which he has a passion, although some commentators have read it as a metaphor for Gilmour's feelings about striking out as the new leader of Pink Floyd after Roger Waters' departure which Gilmour confirmed on the Pink Floyd 25th Anniversary Special in May of 1992. Also an avid pilot, drummer Nick Mason's voice can be heard in the middle of the song. The song is the first CD-only single to be released on a global scale. "Learning to Fly" was included on Pink Floyd's greatest hits collection Echoes: The Best of Pink Floyd.
LEARNING TO FLY LYRICS:
Into the distance, a ribbon of black
Stretched to the point of no turning back
A flight of fancy on a windswept field
Standing alone my senses reeled
A fatal attraction is holding me fast
How can I escape this irresistible grasp?
Can't keep my eyes from the circling skies
Tongue-tied and twisted just an earthbound misfit, I
Ice is forming on the tips of my wings
Unheeded warnings, I thought I thought of everything
No navigator to find my way home
Unladen, empty and turned to stone
A soul in tension that's learning to fly
Condition grounded but determined to try
Can't keep my eyes from the circling skies
Tongue-tied and twisted just an earthbound misfit, I
Above the planet on a wing and a prayer,
My grubby halo, a vapour trail in the empty air
Across the clouds I see my shadow fly
Out of the corner of my watering eye
A dream unthreatened by the morning light
Could blow this soul right through the roof of the night
There's no sensation to compare with this
Suspended animation, a state of bliss
Can't keep my mind from the circling skies
Tongue-tied and twisted just an earthbound misfit, I
For more info: http://www.mpa-garching.mpg.de/galform/press/
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Added: 1 year ago
Views: 86,529
"What happened before the beginning?"
Astrophysicists have no idea. Or, rather, our mos
"What happened before the beginning?"
Astrophysicists have no idea. Or, rather, our most creative ideas have little or no grounding in experimental science. Yet certain type of religious person tends to assert, with a tinge of smugness, that something must have started it all: a force greater than all others, a source from which everything issues. A prime-mover. In the mind of such a person, that something is, of course, God.
But what if the universe was always there, in a state or condition we have yet to identify--a multiverse, for instance? Or what if the universe, like its particles, just popped into existence from nothing?
Such replies usually satisfy nobody. Nonetheless, they remind us that ignorance is the natural state of mind for a research scientist on the ever-shifting frontier. People who believe they are ignorant of nothing have neither looked for, nor stumbled upon, the boundary between what is known and unknown in the cosmos. And therein lies a fascinating dichotomy. "The universe always was" goes unrecognized as a legitimate answer to "What was around before the beginning?" But for many religious people, the answer "God always was" is the obvious and pleasing answer to "What was around before God?"
No matter who you are, engaging in the quest to discover where and how things began tends to induce emotional fervor--as if knowing the beginning bestows upon you some form of fellowship with, or perhaps governance over, all that comes later. So what is true for life itself is no less true for the universe: knowing where you came from is no less important than knowing where you are going.
~ Neil Tyson
The Rev. Tyson Fan Page:
http://www.myspace.com/the_rev_tyson
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Added: 1 year ago
Views: 4,361
I've seen a Few Pale Blue Dot vids on YouTube, just wanted to take a shot.
"Please Post
I've seen a Few Pale Blue Dot vids on YouTube, just wanted to take a shot.
"Please Post any Video Respons, Thanks." -RevTyson
This is one of the best PBD vids on youtube:
Pale Blue Dot - Gabebro1 's Version
http://www.youtube.com/watch?v=D-lgW21hSZw
"Since, in the long run, every planetary civilization will be endangered by impacts from space, every surviving civilization is obliged to become spacefaring--not because of exploratory or romantic zeal, but for the most practical reason imaginable: staying alive... If our long-term survival is at stake, we have a basic responsibility to our species to venture to other worlds."
Carl Sagan, Pale Blue Dot, 1994
Music by, PINK FLOYD
Momentary Lapse of Reason: "ON THE TURNING AWAY"
A remembrance of Carl Sagan, astronomer, writer, and national teacher of science. Here is how he introduced his 1980 public television series "Cosmos."
------------------------------------------------------------ --------------------
CARL SAGAN: ("Cosmos" 1980) The size and age of the Cosmos are beyond ordinary human understanding. Lost somewhere between immensity and eternity is our tiny planetary home, the Earth. For the first time we have the power to decide the fate of our planet and ourselves. This is a time of great danger, but our species is young and curious and brave. It shows much promise. In the last few millennia we have made almost astonishing and unexpected discoveries about the cosmos and our place within it. I believe our future depends powerfully on well we understand this cosmos in which we float like a mode of dust in the morning sky.
We're about to begin a journey through the cosmos. We'll encounter galaxies and suns and planets, life and consciousness coming into being, evolving, and perishing, worlds of ice and stars of diamond, atoms as massive as suns and universes smaller than atoms. But it's also a story of our own planet, and the plants and animals that share it with us, and it's a story about us, how we achieved our present understanding of the cosmos, how the cosmos has shaped our evolution and our culture and what our fate may be. We wish to pursue the truth no matter where it leads, but to find the truth, we need imagination and skepticism both. We will not be afraid to speculate, but we will be careful to distinguish speculation from fact. The cosmos is full beyond measure of elegant truths, of exquisite inter-relationships, of the awesome machinery of nature.
The surface of the Earth is the shore of the cosmic ocean. On this shore we've learned most of what we know. Recently, we've waded a little way out, maybe ankle-deep, and the water seems inviting. Some part of our being knows this is where we came from. We long to return. And we can't, because the cosmos is also within us. We're "made" of star stuff. We are a way that the cosmos can know itself. The journey for each of us begins here. We're going to explore the cosmos in a ship of the imagination, unfettered by ordinary limits on speed and size, drawn by the music of cosmic harmonies. It can take us anywhere in space and time. Perfect as a snowflake, organic as a dandelion seed, it will carry us to worlds of dreams and worlds of facts. Come with me.
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Added: 1 year ago
Views: 83,542
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Found@:http://www.youtube.com/klockantre
Recorded in 1989
Found@:http://www.youtube.com/klockantre
Recorded in 1989
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Added: 1 year ago
Views: 2,408
Stephen Hawking - God, the Universe, & Everything Else / Carl Sagan, Arthur C. Clarke (198
Stephen Hawking - God, the Universe, & Everything Else / Carl Sagan, Arthur C. Clarke (1988)
British journalist and TV host Magnus Magnusson tackles big questions about our universe in this educational colloquium that brings together three of the 20th century's leading scientific thinkers: theoretical physicist Stephen Hawking, astronomer Carl Sagan and author Arthur C. Clarke. They explore everything from the Big Bang Theory to the expansion of the universe, black holes, extraterrestrial life and the origins of creativity.
NOTE: Becasue this is a copyrighted program, I can only post a few clips. But here are a few links on where you can rent or buy it.
http://www.netflix.com/Movie/70062143?trkid=73
http://www.amazon.com/Stephen-Hawking-Universe-Everything-Ar thur/dp/B000LP6KQW
http://www.cduniverse.com/productinfo.asp?pid=7360416
http://search.reviews.ebay.com/God-The-Universe-and-Everythi ng-Else-Stephen-Hawking_UPC_032031414990_W0QQfvcsZ1177QQsopr Z56799223
http://www.myspace.com/sagans_myspace
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Added: 1 year ago
Views: 68,898
Neil Tyson - Stupid Design
Neil Tyson - Gods retreat from cosmology.
http://www.youtub
Neil Tyson - Stupid Design
Neil Tyson - Gods retreat from cosmology.
http://www.youtube.com/watch?v=eV1r4fxaZsE
Beyond Belief '06 - Neil deGrasse Tyson First Talk (Full)
http://video.google.com/videoplay?docid=-102519600994873365
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Added: 1 year ago
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